Maintenance: scan items from spoiler log

Add a maintenance module action, scanSpoilerItems, that checks items in the given spoiler log against its world's game's definition. Intended as a last-line sanity check to determine which games need item definitions added or updated.

Output:

• Highlighted line for each item (or entire game) not found
• Overall results, X worlds scanned, Y found out of Z total items scanned, and break down Y out of Z for each game